Electronics Forum | Fri Oct 14 09:21:36 EDT 2005 | lupo
According with temperature vs. wetting force diagram 245-250C/degrees is better, so lower temperature than 500F means better solder fill. If the speed is too lower the solder suck out form the hole. Usually 120-150cm/min. is good. (2-4s contact
Electronics Forum | Tue Aug 01 18:28:47 EDT 2017 | zsoden
Thanks for the suggestions. 1. By this are you referring to the flux specifications or the actual profile of the machine? 2. Yes, the entire machine, the solder pot and the wave nozzles have all been levelled. The better joints on one side are perp
Electronics Forum | Mon Jun 05 18:50:10 EDT 2017 | caurbach
Hi Zac, My 2 cents: We had similar problems on a board in the same situation (tin-lead HASL, very long leads, low pot height, high pump RPM). Trimming the leads shorter, moving the pot closer to the board, and dropping the pump speed down to sane
Electronics Forum | Mon Jun 05 19:08:08 EDT 2017 | zsoden
Thanks for the suggestions, Caurbach. We do have the occasional lead jumping out even at this length, hence why we've been hesitant to cut them shorter. I have the wave nozzle to PCB distance set as per the machine instructions (4mm I think?). I ce
Electronics Forum | Tue Dec 21 08:33:54 EST 1999 | Nancy V
Luis, Go to the library on SMTnet and you will see Standard and Terms. Select that and you will be able to download the terms and definitions for SMT assembly. It is very useful. Of the terms you requested, only FPY is not there. I was curious a
Electronics Forum | Sun Oct 11 13:53:26 EDT 1998 | Vincenzo Longobardo
I have datas to substain that a not wetting PCB ( the HAL oxided or not uniform in thickness )if soldered in reflow, it shows voids with X-Ray inspection.The voids are in side all the joints not only on the solder pads levell. Is there a technical d
Electronics Forum | Tue May 23 03:40:20 EDT 2017 | bukas
the problem I had with pump was that turbine intake was eached by alloy. when I repaired intake, it was a irregular hole about 32mm in diameter, mechanics welded piece of plate with a 24mm hole (that was a factory size) we had to reduce pump speed fr
Electronics Forum | Tue May 23 03:51:41 EDT 2017 | bukas
i had 2 pumps xD also, propeller size can give you a clue. do some research on turbines of any kind, its same principal. you can have someone check it for you on same machine, i'm sure someone will help.
Electronics Forum | Wed Jun 07 09:39:49 EDT 2017 | stevezeva
Hi again Zac, Nickel appears a little darker and won't have as much of a deposit as it is plated on. But if you want a quick test you can buy a little kit from Amazon that tests for nickel. Some people are allergic to Nickel https://www.amazon.com/
Electronics Forum | Tue Aug 01 07:24:39 EDT 2017 | emeto
Zac, how about the following: 1. Thermal profile for the flux 2. Is your wave leveled? - If you see better joints on one side, you should probably level the machine 3. Just for elimination, do you have another flux, that you could spray on a board